How can I ignore the 'VIRTUAL_ENV' environment variable?

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Issue

In my projects, I create the virtual environment in the project root ($ poetry config settings.virtualenvs.in-project true) so that I can explicitly manage dependencies and cache them between builds.

Travis CI runs builds inside of its own virtual environment (thus sets VIRTUAL_ENV).

The current logic consults VIRTUAL_ENV before any other settings: https://github.com/sdispater/poetry/blob/ae1773d68f341c34d9124353f7a952d5fd3cfefb/poetry/utils/venv.py#L47-L50

How can I tell poetry to ignore VIRTUAL_ENV and always create a virtual environment?

pipenv gets around this by adding another environment variable (PIPENV_IGNORE_VIRTUALENVS). but I think poetry can do better.

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Proposal A

The default value of settings.virtualenvs.create is inferred from VIRTUAL_ENV (false if set, true if unset).

If the user runs $ poetry config settings.virtualenvs.create true then poetry will always create a virtual environment irrespective of VIRTUAL_ENV.

Proposal B

Add settings.virtualenvs.ignore-active to ignore VIRTUAL_ENV when creating a virtual environment.

Proposal C

If settings.virtualenvs.in-project is set and ./.venv/ does not exist then VIRTUAL_ENV is ignored.

[bertjwregeer]

@jacebrowning, run poetry while unsetting VIRTUAL_ENV:

env -u VIRTUAL_ENV poetry

Now even though you are “Inside” an virtual environment, poetry won’t know about it.

[stale[bot]]

Closing this issue automatically because it has not had any activity since it has been marked as stale. If you think it is still relevant and should be addressed, feel free to open a new one.